防止贵金属变色剂 Noble metal off-color resistance
金属性变色 metallic discoloration
令跑车身变成金属颜色 TINFOILED
镀金属防变色制剂 Anti-tarnishing preparations for coating metals
钌：像铂和钯一样，钌是一种不易变色的银白色金属。
Ruthenium (ru) : Like platinum and palladium, ruthenium is a silvery metal that does not easily tarnish.
发霉变色：这种问题多发生在潮湿的油漆表面，如水汽凝聚在玻璃和金属表面时常会产生棕黑色的污斑。
Mildewy become angry: this kind of question happens in damp paint surface more if lunt condenses in glass and metallic surface constant meeting produces the blotch of palm black.
方法：对临床6年期间用金属烤瓷方法修复的各种牙齿缺损、 缺失、 变色、 畸形、 错位等共720名患者计750件修复体的临床观察。
Methods 750 metal-porcelain prostheses in 720 clinical cases such as dentition defect missing, discoloration, abnormity and allotopia etc have been investigated and analysed during 6 years.
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